Heating device



FIG. 1 is a front perspective view of a heating device according to the invention.

FIG. 2 is a front view of the heating device of FIG. 1.

FIG. 3 is a rear view of the heating device of FIG. 1.

FIG. 4 is a left side view of the heating device of FIG. 1.

FIG. 5 is a right side view of the heating device of FIG. 1.

FIG. 6 is a top plan view of the heating device of FIG. 1.

FIG. 7 is a bottom plan view of the heating device of FIG. 1; and,

FIG. 8 is a rear perspective view of the heating device of FIG. 1.

The broken lines shown in the drawings are included for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a heating device, as shown and described. 